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#1 pulse adernaline 125 photo guide to main jet swap07-07-2011, 09:54 PM
hi guys, dont know if this should be here or in maintenance?
im sure a mod could move it if needs be.
just a basic photo set to show the simple points involved in changing a main jet on a mikuni vm22 carb
ive not included the pull the carb off the bike and chuck the carb back on the bike as its a bit of a no brainer once everything is disconnected,
tools used and a reference as to what the jets look like are included,
please feel free to comment, or add your own info as required.
thanks, james
fuel pipe clip by offtheclockuk, on Flickr
carb/ airbox joint by offtheclockuk, on Flickr
undo nuts securing carb by offtheclockuk, on Flickr
unscrew piston cap by offtheclockuk, on Flickr
remove piston by offtheclockuk, on Flickr
dont damage piston or needle by offtheclockuk, on Flickr
remove screws from bowl by offtheclockuk, on Flickr
remove bowl by offtheclockuk, on Flickr
secure jet body and remove jet by offtheclockuk, on Flickr
screw in larger jet by offtheclockuk, on Flickr
check for obstruction/damage before closing up by offtheclockuk, on Flickr
refit and check connections by offtheclockuk, on Flickr
tools used by offtheclockuk, on Flickr
112.5 left - 115 right by offtheclockuk, on Flickr
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#2 Re: pulse adernaline 125 photo guide to main jet swap
- Join Date
- Oct 2009
- Location
- Portugal
- Posts
- 80
07-08-2011, 05:07 PMHi
what Main Jet size are you using?
cheers
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#3 Re: pulse adernaline 125 photo guide to main jet swap
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#4 Re: pulse adernaline 125 photo guide to main jet swap
- Join Date
- Oct 2009
- Location
- Portugal
- Posts
- 80
07-08-2011, 05:27 PMthank you for your quick reply!
Did you already check your plug? 115 isn't too rich?
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#5 Re: pulse adernaline 125 photo guide to main jet swap07-08-2011, 07:26 PM
I checked the plug right after I did the swap, not done a chop at wot yet, the bike pulls hard to the rev limit, but before the swap on the #112.5 jet, it went flat around 6k and didn't want to rev further, when you snap the throttle open then shut again, there's a flash of bright blue flame, that's meant to indicate complete burn so mix must be close to right.
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#6 Re: pulse adernaline 125 photo guide to main jet swap
- Join Date
- Jun 2011
- Location
- basingstoke
- Posts
- 35
07-08-2011, 09:36 PMhey man me and u have the same carb im looking changing the jet myself where can i get one and how can i find out what size i need
cheers
guy
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#7 Re: pulse adernaline 125 photo guide to main jet swap07-08-2011, 09:41 PM
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#8 Re: pulse adernaline 125 photo guide to main jet swap
- Join Date
- Jun 2011
- Location
- basingstoke
- Posts
- 35
07-08-2011, 09:49 PMkool ive gt a race cdi and full custom stainless steel exhaust system also making a custom ram air filter for it so may need a fair bit of fuel going in what u think if i go straight to 105 then higher if i need?
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#9 Re: pulse adernaline 125 photo guide to main jet swap07-08-2011, 09:56 PM
I'm up as far as 115, just trying each one for a few days till I'm happy, with all that you have done to yours 105 may not be enough!
Out of interest do you know where your cdi came from as I'm looking at getting one, there is a slight miss at high revs and full throttle, also is the cdi just a rev limit raise or does it increase power/timing etc?
Thanks, james
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#10 Re: pulse adernaline 125 photo guide to main jet swap
- Join Date
- Jun 2011
- Location
- basingstoke
- Posts
- 35
07-08-2011, 10:12 PMjsut to let you know i actually have a superbyke RSR 125 same engine as yours so same general tuning i have a kamakazi cdi gives me a power band over 8 thousand revs only problem is 3rd 4th n 5th i have trouble geting over 8 thousand revs so more air/fule is needed if u can find a kamakazi one ace but there hard to get also bigger spark
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